1 files changed, 88 insertions, 0 deletions
diff --git a/animism-align/frontend/app/views/align/components/timeline/ticks.component.js b/animism-align/frontend/app/views/align/components/timeline/ticks.component.js
new file mode 100644
index 0000000..4530863
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+++ b/animism-align/frontend/app/views/align/components/timeline/ticks.component.js
@@ -0,0 +1,88 @@
+import React, { Component } from 'react'
+
+import { ZOOM_STEPS, ZOOM_LABEL_STEPS, ZOOM_TICK_STEPS, INNER_HEIGHT } from 'app/constants'
+import { timestamp } from 'app/utils'
+
+export default class Ticks extends Component {
+  render() {
+    let { start_ts, zoom, duration } = this.props.timeline
+
+    let secondsPerPixel = ZOOM_STEPS[zoom] * 0.1 // 0.1 sec / step
+
+    let widthTimeDuration = INNER_HEIGHT * secondsPerPixel // secs per pixel
+
+    let timeMin = start_ts
+    let timeMax = Math.min(start_ts + widthTimeDuration, duration)
+    let timeWidth = timeMax - timeMin
+
+    let pixelMin = timeMin / secondsPerPixel
+
+    let secondsPerLabel = ZOOM_LABEL_STEPS[zoom] // secs
+    let pixelsPerLabel = secondsPerLabel / secondsPerPixel
+    let secondsPerTick = ZOOM_TICK_STEPS[zoom]
+    let pixelsPerTick = secondsPerTick / secondsPerPixel
+
+    let startOffset = pixelsPerLabel - (pixelMin % pixelsPerLabel)
+    let startTiming = (pixelMin + startOffset) * secondsPerPixel
+
+    let labelCount = Math.ceil(INNER_HEIGHT / pixelsPerLabel) + 1
+    let offset, timing, tickLabels = [], ticks = []
+    for (var i = -1; i < labelCount; i++) {
+      offset = i * pixelsPerLabel + startOffset
+      if (offset > INNER_HEIGHT) continue
+      timing = i * secondsPerLabel + startTiming
+      if (timing > duration) {
+        break
+      }
+      tickLabels.push(
+        <div className='tickLabel' key={"tickLabel_" + i}
+          style={{
+            top: Math.floor(offset)
+          }}>
+          {timestamp(timing)}
+        </div>
+      )
+    }
+
+    let durationOffset = duration / secondsPerPixel - pixelMin
+    if (timing > duration) {
+      tickLabels.push(
+        <div className='tickLabel tickLabelTotal' key={"tickLabel_total"}
+          style={{
+            top: durationOffset
+          }}>
+          {timestamp(duration, 1)}
+        </div>
+      )
+      ticks.push(
+        <div className='tick' key={"tick_total"}
+          style={{
+            top: Math.floor(durationOffset),
+          }}
+        />
+      )
+    }
+    let tickCount = Math.ceil(INNER_HEIGHT / pixelsPerTick) + 6
+    for (var i = 0; i < tickCount; i += 1) {
+      offset = i * pixelsPerTick + startOffset - pixelsPerLabel
+      if (offset > durationOffset) {
+        break
+      }
+      ticks.push(
+        <div className='tick' key={"tick_" + i}
+          style={{
+            top: Math.floor(offset),
+          }}
+        />
+      )
+    }
+    // console.log(ticks.length)
+
+    return (
+      <div className='ticks'>
+        {ticks}
+        {tickLabels}
+      </div>
+    )
+  }
+}